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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 13, No. 2, 2016, pp. 423-434
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Bioline Code: st16038
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 13, No. 2, 2016, pp. 423-434
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Synthesis of a novel 3 %Ru/CeZr0.5GdO4 nanocatalyst and its application in the dry and steam reforming of methane
Shariatinia, Z.; Khani, Y. & Bahadoran, F.
Abstract
A novel 3 %Ru/CeZr0.5GdO4 nanocatalyst was
synthesized by the wet impregnation method and evaluated
for its catalytic activity in dry and steam reforming of
methane at atmospheric pressure, seven various temperatures
(from 500 to 800 °C) and two different gas hourly
space velocity values (7000, 10,500 h-1). The thermogravimetric
diagrams of the used catalysts did not illustrate
any carbon deposition on the catalysts applied in both the
dry and steam reforming processes and this valuable phenomenon
was supported by the scanning electron microscopy
images. The low onset reduction temperature in the
temperature-programmed reduction profile of the 3 %Ru/
CeZr0.5GdO4 at 183.21 °C reflected much convenient
reducibility/oxygen mobility property of the catalyst.
Comparing the CH4 conversions in the dry reforming
(92 %) and steam reforming (97 %) reactions using the gas
hourly space velocity = 10,500 h-1 at 800 °C indicated
higher efficiency of the steam reforming process. The time
on stream experiments for the dry and steam reforming
reactions exhibited that the CH4 and CO2 conversions are
almost constant (and even they are slightly increased in the
dry reforming) after 30 h reflecting the catalyst outstanding
stability with time, absence of coke deposition and catalyst
very high activity.
Keywords
Methane dry reforming; Methane steam; reforming; CeZr0.5GdO4 support; Nanocatalyst
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